Screeching wipers!

Recently, my wipers have started to literally screech whenever they move, wet or dry. It’s not the blades either as they do it when the blades are up. I’ve also removed the arms to see if they’re rubbing on something and it still makes the noise when it’s just the stubs/dowels moving.

It’s that bad that I end up with a headache whenever it rains!

Has anyone had this experience and could share their solution or have a good idea what it could be and how to solve.